Thermo-mathematical model for parabolic trough collector using a complete radiation heat transfer model – A new approach

•A complete radiation heat transfer model s developed for receiver tube.•Contour integration technique and analytical methods are used to obtain View factor.•Gebhart factor is used for modeling all modes of radiation heat transfer.•RMSE of View factor algebra is obtained as 5.5394e-5.•Efficiencey an...

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